'Ought' in the Bible

Our fathers worshipped in this mountain; and ye say, that in Jerusalem is the place where men ought to worship.

Therefore said the disciples one to another, Hath any man brought him ought to eat?

If I then, your Lord and Master, have washed your feet; ye also ought to wash one another's feet.

The Jews answered him, We have a law, and by our law he ought to die, because he made himself the Son of God.